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Mid-Flex 300

Description

Mid-Flex 300, a paper-faced, laminated composite corner tape from Strait-Flex, beautifully finishes outside corners, off angles, and vaulted ceilings. Mid-Flex 300 is also a great choice when replacing damaged metal corner bead. This 3” tape features a pre-finished surface with a PUR–laminated nose ensuring perfect corners without paper fuzz-up during finishing and sanding. The tape’s outer edge features a diamond punch pattern for a superior bond, faster drying, with no rippling or blistering. Highly recommended for corners in vaulted ceilings.


  • Off angles and outside 90º corners.

  • Outside corners where a large fill or straightening is required.

  • Outside corners of bay windows, coffers.

  • Vaulted ceilings and butterfly vaults.

  • Replacing damaged metal corner bead.

Size: 3”w (76mm)
COLOR CODE SILVER

Installation

PREPARATION

Run your taping knife over the surface of the drywall and remove any high spots. If the knife hits a screw head, set the screw a little deeper. Use a drywall rasp to clean up edges, if needed.
 
Measure length and cut Mid-Flex300 using a scissors or utility knife.

(1) Fold Mid-Flex300 in half at center crease to desired angle.

(2) Most professionals prefer to cut the ends of Mid-Flex300 at a 45º angle.

(3) For outside corners, fold more than desired angle with print side facing out. For inside corners, fold less than desired angle with print side facing out.

Properly mix all-purpose compound per manufacturer’s directions. If applying Mid-Flex300 over painted surfaces, add Strait-Flex’s Super-Bond or latex paint to enhance bondability.
 
STEP ONE

(4) With a 5”or 6” taping knife, apply a smooth, liberal coat of compound to corner.

(5) Press Mid-Flex300 into the wet compound. Adjust if necessary to create a straight line.

(6) Wipe down tight with taping knife using a little additional pressure on the outer edges of Mid-Flex300. Let dry completely several hours or overnight.

STEP TWO

(7) Apply a light skim coat of compound to the outer edges of Mid-Flex300. Wipe down smooth. No compound is required over the laminated area of Mid-Flex300. Let dry completely over several hours or overnight.

STEP THREE

Use taping knife to detect and remove any high spots or dried clumps of compound.

(8) With 6”or 8” taping knife, apply your final coat of compound feathering the compound beyond previous coat. For inside corners, a very light coat of compound is all that is needed. Lightweight compound used in this step makes  sanding much easier. Let dry completely over several hours or overnight.

STEP FOUR

(9) Sand lightly with 120 grit sandpaper. Mid-Flex300 will not fuzz-up like paper or mesh tapes.

HELPFUL HINTS

Use a stainless steel mud pan to carry and re-mix compound as you work. Keeping your compound smooth and free of air pockets and dried clumps of compound, will deliver a smooth finish.

Have a five gallon bucket of water with a durable sponge handy for cleaning tools.

When painting, apply a base coat of drywall primer to seal the compound and assure an even paint finish.

Additional Information

Bullet Points No
Instructions for Use

PREPARATION

Run your taping knife over the surface of the drywall and remove any high spots. If the knife hits a screw head, set the screw a little deeper. Use a drywall rasp to clean up edges, if needed.
 
Measure length and cut Mid-Flex300 using a scissors or utility knife.

(1) Fold Mid-Flex300 in half at center crease to desired angle.

(2) Most professionals prefer to cut the ends of Mid-Flex300 at a 45º angle.

(3) For outside corners, fold more than desired angle with print side facing out. For inside corners, fold less than desired angle with print side facing out.

Properly mix all-purpose compound per manufacturer’s directions. If applying Mid-Flex300 over painted surfaces, add Strait-Flex’s Super-Bond or latex paint to enhance bondability.
 
STEP ONE

(4) With a 5”or 6” taping knife, apply a smooth, liberal coat of compound to corner.

(5) Press Mid-Flex300 into the wet compound. Adjust if necessary to create a straight line.

(6) Wipe down tight with taping knife using a little additional pressure on the outer edges of Mid-Flex300. Let dry completely several hours or overnight.

STEP TWO

(7) Apply a light skim coat of compound to the outer edges of Mid-Flex300. Wipe down smooth. No compound is required over the laminated area of Mid-Flex300. Let dry completely over several hours or overnight.

STEP THREE

Use taping knife to detect and remove any high spots or dried clumps of compound.

(8) With 6”or 8” taping knife, apply your final coat of compound feathering the compound beyond previous coat. For inside corners, a very light coat of compound is all that is needed. Lightweight compound used in this step makes  sanding much easier. Let dry completely over several hours or overnight.

STEP FOUR

(9) Sand lightly with 120 grit sandpaper. Mid-Flex300 will not fuzz-up like paper or mesh tapes.

HELPFUL HINTS

Use a stainless steel mud pan to carry and re-mix compound as you work. Keeping your compound smooth and free of air pockets and dried clumps of compound, will deliver a smooth finish.

Have a five gallon bucket of water with a durable sponge handy for cleaning tools.

When painting, apply a base coat of drywall primer to seal the compound and assure an even paint finish.

Size 3”w (76mm)
Instructions PDF No
Submittal PDF /media/wysiwyg/straitflex/submtl/Submtl_Sheets_MidFlex300.pdf
Testimonial PDF No
Warranty PDF No
Bulk Order Page URL N/A

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