W1
Learning Area
Quarter
TLE - Automotive
Three
Grade Level
Date
7/8
I. LESSON TITLE
II. MOST ESSENTIAL LEARNING
COMPETENCIES (MELCs)
APPLYING APPROPRIATE SEALANT/ADHESIVE (AAS)
LO 1. Identify appropriate sealant/adhesive (TLE_IAAUTO9-12AAS-Ia-1)
LO 2. Prepare surface for sealant/adhesive application
(TLE_IAAUTO9-12AAS-Ia-2)
1.1 Select sealant/adhesive in line with job
III. CONTENT/CORE CONTENT
requirements and manufacturer’s specifications
1.2 Perform sealant/adhesive checking to ensure the product is fit for use
2.1 Identify the types of sealant and adhesives
according to surface
2.2 Clean surface free of moisture, dust, and
other foreign matters to ensure maximum
adhesion or seal
https://www.scribd.com/document/349480577/apply-appropriate-sealant-oradhesive
http://shsph.blogspot.com/2016/03/automotive-servicing-nc-i-learning.html
Suggested
Learning Activities
IV. LEARNING PHASES
Timeframe
Day 1
Presentation
A. Introduction
40 mins.
In this lesson, you will learn the different types, the cleaning process
and the appropriate sealant/adhesive to be use.
Activity1: Vocabulary
Find and circle all the direction words that are hidden in the grid. The words
may be hidden in any direction. Write your answers to your notebook.
AEROBIC GASKET
CURING SEALANT
PLIABLE SEALANT
CATALYST
DRYING SEALANT
VISCOSITY
VOLATILITY
Activity 2:
What is an Adhesive?
What is Sealant?
How Do They Differ?
Think on this:
Adhesives and sealants are often lumped together, as they were
versions of the same product with the same function. But they’re not.
Adhesives and sealants are different.
An adhesive is a material that joints two surfaces together by
bonding them. It is usually applied as a thin layer between two surfaces.
A Sealant is a material designed only to fill up spaces can be joints,
gaps or cavities that occur between two substrates.
IV. LEARNING PHASES
Suggested
Timeframe
Learning Activities
The physical conditions surrounding the seal govern the type of
sealant to be used. Some sealants are exposed to extremely high or low
temperatures. Other sealants contact fuels and lubricants. Therefore, it is
necessary to use a sealant that has been compounded for the particular
condition. Sealants are supplied in different consistencies and cure rates.
Basic sealants are classified in three general categories—pliable, drying,
and curing.
TYPES OF SEALANTS
1. Pliable sealants are referred to as one-part sealants and are
supplied "ready for use" as packaged. They are solids and change very little
during or after application. Solvent is not used with pliable sealants.
Therefore, drying is not necessary. Except for normal aging, they remain
virtually the same as when they were packaged. They easily adhere to
metal, glass, and plastic surfaces. Pliable sealants are used around access
panels and doors and in areas where pressurization cavities must be
maintained.
2. Drying sealants set and cure by evaporation of the solvent.
Solvents are used in these sealants to provide the desired application
consistency. Consistency or hardness may change when this type of
sealant dries, depending on the amount of solvent it contains. Shrinkage
during the drying process is an important consideration. The degree of
shrinkage also depends upon the amount of solvent it contains.
3. Curing Sealants
Catalyst-cured sealants have an advantage over drying sealants because
they are transformed from a fluid or semi fluid state into a solid by chemical
reaction rather than by evaporation of a solvent. A chemical catalyst or
accelerator is added and mixed just prior to sealant applications. Heat
may be employed to speed up the curing process. When you use a
catalyst, you should accurately measure and thoroughly mix the two
components to ensure a complete and even cure.
Uses of Sealant/Adhesive
The adhesive and sealants includes two chemically similar but
functionally different groups of formulated products, adhesive and
sealants.
1. Adhesive products are used to bond between two different or similar
materials.
2. Sealants are used to create an impenetration barrier to gas or moisture.
Types of surface materials
Surface Materials:
1. Glass
2. Stone
3. Wood
4. Metals
The epoxy and polyurethane systems are most often used in the
reactive sector.
Urethanes is used with flexible materials in high impact
applications, while epoxies are known for their hardness and are used with
more rigid substances.
Prepare surface for sealant/adhesive
Cleanliness is the key in preparing the surface. A clean surface
may have a good result during the application of sealant/adhesive.
Special procedures for installing gaskets.
1. Never use old gasket
2. Handle new gasket carefully
3. Use gasket sealant only when they are absolutely necessary.
4. Cleanliness is essential.
5. Use the right gasket in the right position.
IV. LEARNING PHASES
B. Development
Suggested
Timeframe
Day 2
10 mins.
Learning Activities
Learning Task 1.
On your activity notebook complete the sentence:
1. The water will _____________to a cracked container.
2. To repair the cracked on the container put _______________.
3. ___________first before applying the sealant.
4. ___________ the tools before applying sealant.
5. Identify the type of _____________ suited to the materials to be repair.
Learning Task 2. Identify me! Write your answer in your notebook.
1. _______________ set and cure by evaporation of the solvent.
2. _______________ is a material that joints two surfaces together by
bonding them.
3. _____________ is a material designed only to fill up spaces can be
joints, gaps or cavities that occur between two substrates.
4. The ______________ and 5. _________________ systems are most often
used in the reactive sector.
C. Engagement
Day 3
40 mins.
Learning Task 3: Identify the ff.
Direction. Select the answer from the box below.
Curing sealant
Pliable sealant
Sealant
urethanes
Surface material
Aerobic sealant
Chemical catalyst
Drying sealant
Adhesive
Epoxies
1. Referred to as one-part sealants and are supplied ―ready for use‖ as
Packaged.
2. Set and cure by evaporation of solvent.
3. Catalyst-cured sealants have an advantage over drying sealants
because they are transformed from fluid or semi fluid state into a solid by
chemical
reaction rather than by evaporation of a solvent.
4. Glass, stone, wood and metals are types of ___.
5. It is used to create an impenetration barrier to gas or moisture.
6. A product which use to bond between two different or similar materials.
7. It is added and mixed just prior to sealant application.
8. Supplies that are known for their hardness and are used with more
substances.
9. Supplies used for flexible materials in high impact applications.
Learning Task 4. Fill in the blank: Read the statement carefully and fill the
blanks with the correct answer. Write your answer on your notebook.
1. To remove the excess sealant/adhesive use _____________.
2. After removing the excess sealant/adhesive wipe with clean rags and
___________________.
3. Sealant/adhesive must be stored in ______________________.
4. Sealant industry have expressed a desire to move away from the used
of primer adhesive system because of their __________ and _________.
D. Assimilation
Learning Task 5: Examples
1. Give 5 examples of sealant.
2. Give the manufacture’s procedure on how to use each product.
3. Based on your examples, what is the best sealant for you? Why?
IV. LEARNING PHASES
V. ASSESSMENT
Suggested
Timeframe
Day 4
40 mins.
Learning Activities
Learning Task 6:
Directions: Multiple Choice: Select the best answer that corresponds to
the statement.
1. Referred to as one-part sealants and are supplied ―ready for use‖ as
Packaged.
a. Curing sealant
b. Pliable sealant
c. Drying sealant
d. All of the above
2. Set and cure by evaporation of solvent.
a. Curing sealant
b. Pliable sealant
c. Drying sealant
d. Aerobic sealant
3. Catalyst-cured sealants have an advantage over drying sealants
because they are transformed from fluid or semi fluid state into a solid by
chemical reaction rather than by evaporation of a solvent.
a. Drying sealant
b. Curing sealant
c. Aerobic sealant
d. Pliable sealant
4. Glass, stone, wood and metals are types of _________.
a. sealants
b. adhesive
c. epoxy
d. surface materials
5. It is used to create an impenetration barrier to gas or moisture.
a. sealant
b. adhesive
c. urethane
d. epoxy
6. A product which use to bond between two different or similar materials.
a. Sealants
b. Adhesives
c. Urethane
d. Epoxy
7. It is added and mixed just prior to sealant application.
a. chemical catalyst
b. Adhesive
c. Epoxy
d. Urethane
8. Supplies that are known for their hardness and are used with more
substances.
a. Epoxies
b. Urethanes
c. Sealants
d. Adhesives
9. Supplies used for flexible materials in high impact applications.
a. epoxy
b. urethanes
c. sealants
d. adhesive
10. Once the sealant has been applied, the parts must be
a. joint
b. torque
c. rivets
d. all of the above
VI. REFLECTION
•
Prepared by: Mercy Ann G. Giere/ Rafael A. Musa
In your notebook, write your personal insights about the lesson
using the prompts below.
I understand that ___________________.
I realize that ________________________.
I need to learn more about __________.
Checked by:
Zoilo V.Handayan, Jr.
Alberto Laroza
TLE-IA-AU7/8-w1