Mitten›Henry® Kop-R-Lastic™ Thermoplastic Sealant

Kop-R-Lastic™

Name: Exterior Pro Materials
Address: Unit 5, 1235 Journey's End Cir, Newmarket, ON, L3Y 8T7, CA
Telephone: +1 (905) 836-7272

Kop-R-Lastic™ by Henry Company is a one-part thermoplastic synthetic rubber sealant with 200%+ elongation and no-primer adhesion to virtually all building materials. Serviceable from -29°C to 71°C, tack-free in 30 minutes, available in 9 colours. Ideal for window perimeters, metal flashing, masonry joints, and as a termination sealant for BlueskinVP® WRB membranes. 15-year limited warranty.

9 colours

Request a Quote Datasheet

Warranty15-year limited material warranty

Available Colours

Black

Standard

Standard(9)

Colours shown are approximate representations only and may appear differently on screen than the actual product. Request a physical sample before making your final decision.

Profiles & Specifications

KL310Kop-R-Lastic™ Thermoplastic Sealant

One-part, high-performance synthetic rubber sealant — quick drying, highly elastic, and permanently flexible. Excellent adhesion to metal, aluminum, concrete, masonry, wood, PVC/vinyl, glass, and fiberglass with no primer required on any surface. Suitable for vertical and horizontal joints in both exposed and concealed applications. Used as a termination sealant for masonry joints, metal flashing, glazing, and window and door perimeters — including as a termination sealant in conjunction with Henry® BlueskinVP® 100 and 160 Self-Adhered WRB Membranes. Wet or dry application. Available in 9 colours in a 300 mL (10.1 fl. oz.) cartridge. 15-year limited warranty.

Product Type	One-part thermoplastic synthetic rubber sealant
Consistency	Soft, buttery, non-sag
Service Temperature	-29°C to 71°C (-20°F to 160°F)
Tensile Strength	>500 psi
Elongation (Initial)	200% minimum
Peel Strength	5 p.i.w. min. (22N) — Aluminum and Glass
Shore A Hardness	55 maximum
Modulus, 100%	140 psi
Specific Gravity	1.06 @ 25°C (77°F)
Weight	4.5 ±1 kg (10 ±1 lb) per gallon
Joint Dimension	3mm × 3mm to 12.7mm × 12.7mm (1/8" × 1/8" to 1/2" × 1/2")
Tack-Free Time	30 minutes
Dry Time (Full Cure)	3–7 days at room temperature for 9.5mm–12.7mm (3/8"–1/2") max. applied thickness
Paintable	Yes — when fully cured
Water Resistant	Yes
Flash Point	24°C (75°F), tag closed cup
VOC Content	325 g/L maximum
Shelf Life	12 months
Packaging	300 mL (10.1 Fl. Oz.) cartridge
Coverage	Approx. 4.3m (14 lin. ft.) of 9.5mm (3/8") bead per 300 mL cartridge
Colours	Black · White · Clear · Bronze · Brown · Sandalwood · Ivory · Aluminum Stone · Neutral
No Primer Required	No primer needed on any substrate — concrete, masonry, aluminum, steel, glass, fiberglass, or wood
Application	Wet or dry surfaces. Exterior use only. Do not apply below 4°C (40°F). Do not use on insulated glass panels, laminated glass edges, or polystyrene.
Warranty	15-year limited material warranty
Manufacturer	Henry Company — distributed by Mitten Building Products
WHMIS (Canada)	D2A — Very Toxic · B2 — Flammable Liquid
NFPA Rating	Health 2 · Flammability 3 · Reactivity 0

Specifications

Physical Properties

Property	Value
Consistency	Soft, buttery, non-sag
Service Temperature	-29°C to 71°C (-20°F to 160°F)
Tensile Strength	>500 psi
Elongation (Initial)	200% minimum
Peel Strength – Al & Glass	5 p.i.w. min. (22N)
Shore A Hardness	55 maximum
Modulus, 100%	140 psi
Specific Gravity @ 25°C	1.06
Weight	4.5 ±1 kg (10 ±1 lb / gallon)
Joint Dimension	1/8" × 1/8" to 1/2" × 1/2" (3mm × 3mm to 12.7mm × 12.7mm)
Tack-Free Time	30 minutes
Full Cure Time	3–7 days at room temp (3/8"–1/2" max. bead)
Paintable	Yes, when fully cured
Water Resistant	Yes
Flash Point	24°C (75°F), tag closed cup
VOC Content	325 g/L maximum
Shelf Life	12 months

Henry Company Technical Data Sheet — REV: 12/01/2015. Source: Henry Company, El Segundo CA.

Packaging & Coverage

Item	Value
Package Size	300 mL (10.1 Fl. Oz.) cartridge
Coverage	Approx. 4.3m (14 lin. ft.) of 9.5mm (3/8") bead per cartridge
Available Colours	Black · White · Clear · Bronze · Brown · Sandalwood · Ivory · Aluminum Stone · Neutral
Warranty	15-year limited material warranty
For Exterior Use	Yes — not intended for interior use
Min. Apply Temp	4°C (40°F)

Order quantities and lead times may vary. Contact us for availability.

Installation Guide

SURFACE PREPARATION — Apply only to surfaces free from oil, grease, wax, dust, corrosion, moisture, and any material that may interfere with adhesion. No primer is required on any substrate. Do not apply below 4°C (40°F). Do not apply to surfaces continuously immersed in water.
CONCRETE & MASONRY — Fresh concrete must be fully cured and dried (allow 3–4 weeks). Blow or brush dusty surfaces clean. Remove all mold release agents and curing agents. If previously exposed to oil-based caulking, remove all material and sandblast or cut back to remove oil penetration.
ALUMINUM & STEEL — Aluminum: remove protective lacquer film with clean lacquer thinner; remove all previous compounds or surface oxidation via chemical treatment, solvent, sandblasting, or wire brushing. Steel: remove all corrosion and coatings by chemical treatment, solvent, sandblasting, or wire brushing; rinse thoroughly after chemical treatment.
GLASS, FIBERGLASS & WOOD — Glass/Fiberglass: wipe surfaces with clean, oil-free solvent and dry thoroughly. Wood: remove all paint and loose coatings; sand to a good clean surface. No primer required, even on oily woods such as teak.
BACK-UP MATERIAL & JOINT SIZE — Use in joint openings from 3mm × 3mm to 12.7mm × 12.7mm (1/8" × 1/8" to 1/2" × 1/2"). When openings are deeper than desired, pack with backer rod joint filler before applying sealant.
APPLICATION — Mask adjacent surfaces with tape for a neat joint. Apply from the bottom of the joint upward, filling completely and avoiding entrapped air. Tool the surface immediately for appearance and to ensure full adhesion to joint sides — dry tooling or tooling with Toluol or Xylol preferred. Remove masking tape immediately after tooling is complete.
CLEAN-UP & STORAGE — Clean tools and equipment with Toluol, Xylol, or mineral spirits before sealant cures. Clean skin with waterless hand cleaner. Store cartridges in a cool, dry, well-ventilated area with containers tightly closed. Protect from extreme temperatures. Shelf life: 12 months.
LIMITATIONS & CAUTION — Do not use on insulated glass panels, laminated glass edges, or polystyrene. Not for interior use. Direct contact with asphalt-based materials may cause bleed-through or staining. FLAMMABLE — keep away from heat, sparks, and open flame. Provide adequate ventilation. Avoid inhalation of vapours and contact with eyes and skin. Keep out of reach of children.

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