Sikalastic®-515 FG US
Acrylic Roof Flashing Mastic
100% acrylic elastomeric mastic for easier detailing and flashing with the Sikalastic-515 AC system. Acrylic coatings provide life extension, recover, and enhanced reflectivity of various roof substrates including asphalt, single-ply and metal roofing. Can be used with Sika® Flexitape Heavy for ideal 3-coursing applications.
- Fully-adhered, seamless roofing with Sikalastic-515 AC
- Thicker body allows for easier detailing
- High solar reflectivity lowers internal building temperatures and cooling costs
- Prolongs existing roof's life
- Reduces life cycle costs of existing roofs
- ASTM D6083 Type I acrylic
- Extremely fast and easy application
- Long recoat window
Usage
- Reinforce and waterproof roof seams, penetrations, and vertical transitions, and terminations
- Make spot repairs of existing roofs
- Smooth out details such as bolts and fasteners
- Easier detailing of transitions and penetrations
- Extend the life of existing roofs
- Economical Roof Recovery
- Excellent adhesion to various roof substrates including asphalt, single-ply and metal roofing with listed primers
Advantages
- Fully-adhered, seamless roofing with Sikalastic-515 AC
- Thicker body allows for easier detailing
- High solar reflectivity lowers internal building temperatures and cooling costs
- Prolongs existing roof's life
- Reduces life cycle costs of existing roofs
- ASTM D6083 Type I acrylic
- Extremely fast and easy application
- Long recoat window
Packaging
3.5 gal. Pail
Colour
White
Product Details
ENVIRONMENTAL INFORMATION
- High solar reflectivity and thermal emittance for:
- Energy saving
- Reduces heat island effect
- Environmentally friendly
- Prolongs existing roof life
- Reduced life cycle costs
APPROVALS / STANDARDS
- ASTM D6083 Type I
- California Title 24 compliant
Shelf Life
12 Months
Storage Conditions
Store in dry place at temperatures between 40°F and 80°F away from moisture, heat, sparks and open flames.
Solid content by mass
66% | ASTM D1644 |
Solid content by volume
54% | ASTM D2697 |
Volatile organic compound (VOC) content
48 g/l |
|
Shore A Hardness
70 | ASTM D2240 |
Tensile Strength
310 ± 50 psi | ASTM D2370 |
Adhesion in peel
2 pli for SPUR (wet adhesion) | ASTM C749, D903 |
Wet adhesion is typically obtained with use of a primer (see primer chart for more details).
Tear Strength
130 lbf/in | ASTM D624 |
Low Temperature Bend
Pass 1/2" Mandrel Bend @ -15°F | ASTM D522 |
Water Absorption
8% Water Swelling | ASTM D471 |
Permeability to Water Vapor
47 perms | ASTM D1653 |
Microbiological Resistance
Zero, No Growth (Fungi Resistance) | ASTM G21 |
Behavior after Artificial Weathering
No Cracking or Checking after 1000 hours | ASTM D4798 |
Application
Ambient Air Temperature
Apply above 50°F and only when weather conditions allow sufficient time for curing/drying before rain, dew or freezing temperatures. Cool temperatures and high humidity may increase drying time.
Substrate Temperature
Surface temperatures should be 5°F above the dew point and at least 50°F. In hot climates, apply the base coat in falling temperatures.
Substrate Moisture Content
Substrates should be 4% or less as measured by a Tramex Moisture Meter. Wet adhesion is typically obtained with use of a primer (see primer chart for more details). Do not apply over wet insulation or related materials. Existing Roof membranes and substrates should have a moisture scan before applying Sikalastic®-515 FG US.
Waiting / Recoat Times
Apply an additional coat or Sikalastic-515 AC once previous coat has cured.
Drying Time
Product will skin over in 4 - 6 hours and develop a full cure in 24 - 36 hours depending on temperature and humidity.
SUBSTRATE PREPARATION
- Inspect all areas to receive Sikalastic®-515 FG US and make all necessary repairs
- All surfaces should be properly sloped to drains. Any areas susceptible to ponding water should be resloped to properly shed water from the roof
- All surfaces must be clean, dry and free of dirt, grease, oil, or any other contaminants that would interfere with or prohibit a proper bond
- Membranes with seam and/or flashing failures must be repaired by standard roofing practices
- Tighten and/or replace all existing fasteners
- Install crickets and complete all needed sheet metal repairs
- Prime all surfaces with the appropriate primer
MIXING
Before application, mix Sikalastic® 515 FG using a mechanical mixer at a slow speed. Mix thoroughly until a homogeneous mixture and color are atttained. Do not dilute under any circumstance.
APPLICATION
Use Sikalastic-501 Primer when applying directly over mineral cap-sheets, mod-bit or other asphalt type surfaces for "bleed-blocking" capability. Apply Sikalastic-501 Primer at a rate of 12 -16 mils (0.75 -1.0 gal per 100 SF) depending on substrate roughness.
Prior to coating any surface, be sure the coating will adhere by performing an adhesion test (ASTM D-903). Sikalastic®-515 FG US may be applied by brush, roller, or spatula. Do not apply when temperatures are below 50 °F (10 °C) or when precipitation is in the forecast within 48 hours. In areas where the roof is subject to foot traffic, it is recommended to apply walkway pads for added protection and slip resistance. Apply Primer to the substrate according to the application instruction from the Product Data Sheet, and allow to dry.
Apply/flash Sikalastic®-515 FG US with or without Sika® Flexitape Heavy according to project specifications on the transitions of round projections, machine legs, sign posts, guide wire straps, inside and outside corners, gutters, parapet walls, penetrations and similar areas. Repair any damaged metal and caulk and seal watertight all screws, seams, transitions, terminations, penetrations, skylights, joints, pipes, voids, protrusions and any areas where water could enter through the roof. On metal roofs with standing seams, apply Sikalastic®-515 FG US sealing them completely. Make certain that all walking pads are appropriately and adequately secured. Use Sikalastic®-515 FG US to caulk all edges of walking pads.
Higher humidity and/or colder temperatures will slow the drying time of Sikalastic®-515 FG US. In colder and/or more humid conditions, apply Sikalastic®-515 FG US at thinner application rates for faster drying times (this will also increase the number of required coats).