How to Make Letterboard Letters with Resin!

This post may contain affiliate links, sponsored content and products received at no cost.

6:00 AM

How to Make Letterboard Letters with Resin!

Learn how to make letterboard letters with FastCast resin in just minutes.

Letterboards are so much fun for parties and occasions, but sometimes don't come with enough letters or you need some custom letters made.

Learn how to make your own resin letterboard letters using FastCast Urethane Casting Resin, some toothpicks, stick-on jewels and just a few minutes!

I bought some small letterboards but they did not come with any letterboard letters.

I decided to make my own letters using Castin’ Craft FastCast Resin.

This type of resin cures fast, in just 15 minutes.

It dries white, not clear, so it’s great for resin applications that don’t need to be see-through.

I bought some small letterboards but they did not come with any letterboard letters. I decided to make my own letters using Castin’ Craft FastCast Resin. This type of resin cures fast, in just 15 minutes. It dries white, not clear, so it’s great for resin applications that don’t need to be see-through.

This resin project also works great if you are doing just a few specific letters, rather than trying to mass produce every letter in duplicate for future use.

If you have a silicone mold, you can turn anything into a letterboard pin using this trick too.

Let’s get started.

SUPPLIES NEEDED FOR FAST CAST RESIN LETTERBOARD LETTERS:

FastCast Resin (8 oz is plenty)
Alphabet Silicone Mold
Toothpicks
Letterboard
Mixing Cups, Stirring Sticks, Disposable Gloves and Worksurface
mold release

STEP 1: CUT TOOTHPICKS

Begin by cutting the pointed end of the toothpicks off with some scissors.

The cut-off blunt end will be inserted into the resin while curing to latch into the letterboard.

The resin cures so quickly, these toothpick pieces must be ready to use.

STEP 1: CUT TOOTHPICKS Begin by cutting the pointed end of the toothpicks off with some scissors. The cut-off blunt end will be inserted into the resin while curing to latch into the letterboard. The resin cures so quickly, these toothpick pieces must be ready to use.

STEP 2: MIXING FAST CAST RESIN

Secondly, take the time to read through the resin mixing directions contained in the package.

This resin only needs to be mixed for a minute, then poured into a second cup and stirred with a new stick for 30 more seconds.

It’s important to read through the directions to ensure proper mixing and curing.

STEP 2: MIXING FAST CAST RESIN Secondly, take the time to read through the resin mixing directions contained in the package. This resin only needs to be mixed for a minute, then poured into a second cup and stirred with a new stick for 30 more seconds. It’s important to read through the directions to ensure proper mixing and curing.

STEP 3: FILLING SILICONE MOLD

After the proper 2 phase mixing process for the Fast Cast Resin, use the mixing stick to pour the resin into the mold.

This part can get tricky and messy because the resin thickens and sets up very quickly.

I have a solution for this, that I call “editing”…but you can mix up less resin and work a letter or 2 at a time if that feels better to you.

STEP 3: FILLING SILICONE MOLD After the proper 2 phase mixing process for the Fast Cast Resin, use the mixing stick to pour the resin into the mold. This part can get tricky and messy because the resin thickens and sets up very quickly. I have a solution for this, that I call “editing”…but you can mix up less resin and work a letter or 2 at a time if that feels better to you.

I used 1 teaspoon of each the resin and hardener, so 2 teaspoons and was able to create 11 letterboard letters.

STEP 4: TOOTHPICKS

You will see the resin almost instantly begin to turn white.

Work quickly and insert the toothpick pieces into the top part of each of the letters, starting with the first one filled and so on.

The toothpicks should have no trouble sticking in place because the resin cures so quickly.

Place a toothpick in each letter and then let them cure for 15 minutes.

STEP 4: TOOTHPICKS You will see the resin almost instantly begin to turn white. Work quickly and insert the toothpick pieces into the top part of each of the letters, starting with the first one filled and so on. The toothpicks should have no trouble sticking in place because the resin cures so quickly. Place a toothpick in each letter and then let them cure for 15 minutes.

After 15 minutes, the resin letters can easily be removed from the mold.

If the pour was very clean, the resin letter will be ready to use.

If there is any drips, puddles or lines, there is an easy fix.

STEP 5: EDITING

If there is excess resin around the letters, there is still a little pliability in the resin after 15 minutes of curing time.

This makes it very easy to trim off the excess resin using some small scissors.

If a hole needs to be opened up, you can use a drill and a small hobby knife…or just leave the hole filled for a different look.

STEP 5: EDITING If there is excess resin around the letters, there is still a little pliability in the resin after 15 minutes of curing time. This makes it very easy to trim off the excess resin using some small scissors. If a hole needs to be opened up, you can use a drill and a small hobby knife…or just leave the hole filled for a different look.

Now the letters are ready to use, paint or decorate!

The toothpick top shows a little bit on the top edge of my letters.

I decided that I could either paint the letters or add some jewels…which is what I decided to do.

STEP 6: EMBELLISHING LETTERBOARD LETTERS

I used adhesive jewels in various sizes to fill the top of each letter with a little bling.

This can be done with gem tack and flat back rhinestones or adhesives like these.

This made it a really quick embellishment process and I love how they look!

STEP 6: EMBELLISHING LETTERBOARD LETTERS I used adhesive jewels in various sizes to fill the top of each letter with a little bling. This can be done with gem tack and flat back rhinestones or adhesives like these. This made it a really quick embellishment process and I love how they look!

Creating the perfect letterboard letters for a simple business sign, party or special occasion is easy using FastCast Urethane Casting Resin.

It’s a fun DIY using this quick setting resin. Make a custom piece in less than 20 minutes.

That's it!

See how easy it is to make your own resin letterboard letters using FastCast Urethane Casting Resin, some toothpicks, stick-on jewels and just a few minutes!?

It's perfect for small letterboards that need some custom letters!